Tire pressure measurement device, an integrated circuit, a printed circuit board, a method and a computer program for a vehicle to receive data

ABSTRACT

Embodiments provide a tire pressure measurement device, an integrated circuit, a printed circuit board, a method and a computer program to receive data. The tire pressure measurement device includes a first receiver configured to receive a low frequency signal using a first low frequency input of the first receiver, and a second input configured to receive a receive signal associated with a second receiver that is different from the first receiver. The tire pressure measurement device further includes a controller configured to control the first low frequency input of the first receiver and to couple the second input to the first low frequency input of the first receiver in order for the first receiver to receive the receive signal at the first low frequency input.

FIELD

Embodiments relate to a tire pressure measurement device, an integratedcircuit, a printed circuit board, a method and a computer program for avehicle to receive data.

BACKGROUND

Wheel units are electronic devices, which are used to monitor wheelproperties or parameters. For example, monitoring a tire pressure hasbecome part of governmental regulations in many countries, such thattires or wheels of vehicles are equipped with tire pressure measurementdevices, which communicate signals indicative of a tire pressure to acontrol unit or controller of the vehicle. For example, tire pressurevalues can be determine and displayed to a user of the vehicle, warningindications can be generated if the tire pressure decreases below acritical threshold.

During manufacturing, production and service of the vehicles, wheels ortires, there may be a desire to communicate with wheel units, forexample, for programming, configuration, set up, or security purposes.For example, a wheel unit of a Tire Pressure Monitoring System (TPMS)may have a need of a possibility to receive data during production orservice. Today, a means to transfer data is electromagnetic radiation at125 kHz, which is also referred to as Low Frequency (LF) communication.For example, production lines and service facilities are equipped with125 kHz electromagnetic data transmitters. The wheel units are equippedwith corresponding LF-receive antennas or coils, LF-receivers,respectively. In general the wheel units may transmit and receive data.

For example, data transmission, from the perspective of the wheel unit,may be done via a Radio Frequency (RF) transmitter in an Industrial,Scientific, and Medical (ISM)-band like 315 MHz or 434 MHz. Moreover, anactive circuitry of the RF transmitter may be integrated on chip and anexternal RF antenna circuitry may comprise antenna matching, usuallymade of capacitors and inductors, and an RF antenna, which can beprinted on a Printed Circuit Board (PCB) or be implemented using thickwires or even a metal bar. E.g. data reception, from the perspective ofthe wheel unit, may be done via an LF-receiver at 125 kHz.

SUMMARY

Embodiments provide a tire pressure measurement device, an integratedcircuit, a printed circuit board, a method and a computer program toreceive data. Embodiments enable a utilization of an LF receiver with asignal received by another receiver of a tire pressure measurementdevice. On chip there may be a low-power LF receiver (LFRX) withelaborate analog properties and signal processing capabilities likewake-up on carrier detection and identity (ID)-matching and autonomousdata reception. External to the LFRX, circuitry may comprise one or moreelectronic elements like switches etc. and embodiments may enable toomit an LF coil or to use alternative communication to obtain or receivean LF receive signal. An LF coil does contribute to the physicaldimensions, the weight and the price of the wheel unit, which may beeased or improved by embodiments. Alternative communication may enable ahigher flexibility when communicating with a tire pressure measurementdevice. Embodiments may be enabled to receive data using an LFRXinterface, for example, via an RF antenna circuitry or via anelectromechanical transducer instead of via the LF coil.

Embodiments provide a tire pressure measurement device for a vehicle toreceive data. The device comprises a first receiver to receive a lowfrequency signal using a first low frequency input of the first receiverand a second input for a receive signal of a second receiver beingdifferent from the first receiver. The device further comprises acontroller to control the input of the first receiver and to couple thesecond input for the receive signal to the first low frequency input ofthe first receiver. Embodiments may allow using a second receiver toreceive an LF input signal for an LF-receiver.

In embodiments the second input may be configured to receive the receivesignal using a frequency band outside a low frequency band used by thefirst receiver. Embodiments may enable communication in a differentfrequency band to obtain the LF input signal. The second input may beconfigured to receive a radio frequency receive signal and thecontroller may be configured to convert the radio frequency receivesignal into the low frequency receive signal, which is then coupled tothe first low frequency input of the first receiver. Embodiments mayconvert radio signals from other frequency bands into an LF signal asinput for the LF-receiver. The controller may comprise a demodulatorconfigured to demodulate the radio frequency receive signal into the lowfrequency receive signal. For example, the demodulator may comprise atleast one non-linear electronic component, such as at least one diode.Embodiments may provide an efficient implementation for converting ordemodulating an RF signal into an LF signal.

In some embodiments the demodulator may be configured to demodulate anAmplitude Modulated (AM) or an Amplitude-Shift-Keying (ASK)-modulatedradio frequency receive signal into the low frequency receive signal.Embodiments may enable efficient communication using amplitudemodulation. For example, the tire pressure measurement device mayfurther comprise the second receiver, a matching network for the secondreceiver and/or a radio frequency antenna.

In some embodiments the second input is configured to receive thereceive signal being based on an acoustic receive signal. Embodimentsmay enable acoustic communication with the tire pressure measurementdevice. The tire pressure measurement device may further comprise anacoustical transducer to receive the acoustical receive signal and thetransducer may be configured to convert sound applied to the tire intoan electrical signal as receive signal. Embodiments may enable acousticcommunication from outside the tire to the inside of the tire. Thecontroller may be configured to couple the electrical signal to theinput of the first receiver. In some embodiments the transducer may beconfigured to convert mechanical energy from tire deformation intoelectrical energy for powering the tire pressure measurement device.Embodiments may enable synergy effects by re-using a transducer forenergy harvesting also for communicating. In even further embodimentsthe transducer may be further configured to carry out soundmeasurements. Embodiments may re-use a transducer for measurements, suchas tread depth measurements or water contact measurements and enableanother or a further synergy effect.

In some embodiments the controller may be configured to couple and todecouple the second input with the first low frequency input.Embodiments may use the second input for different purposes, e.g. forcommunicating using different frequencies or media. The controller maybe configured to switch the second input between the first input of thefirst receiver and at least one other signal. Embodiments may enable tocouple the second input with different other components and use thesecond receiver for different purposes, e.g. other communication,measurements, data transmission, etc.

The tire pressure measurement device may comprise a low frequency coiland the controller may be configured to couple the low frequency coil tothe first input of the first receiver. Therewith the tire pressuremeasurement device may provide different options for receiving the LFreceive signal, e.g. using RF, using sound, or using LF with a coil.Embodiments may hence provide multiple implementation options.

Embodiments further provide an integrated circuit comprising a tirepressure measurement device according to the above description.Embodiments further provide a printed circuit board comprising theintegrated circuit.

Embodiments further provide a method for receiving data at a tirepressure measurement device for a vehicle. The method comprisescontrolling an input of a first receiver for a low frequency signal, andproviding a receive signal from a second receiver, which is differentfrom the first receiver. The method further comprises coupling thereceive signal to the input of the first receiver.

Embodiments further provide a computer program product comprising acomputer readable medium having computer readable program code embodiedtherein, the computer readable program code being configured toimplement at least one of or a combination of the above-describedmethods, when being loaded on a computer, a processor, or a programmablehardware component.

Embodiments further provide a tire, a TPMS, or a vehicle with anembodiment of a tire pressure measurement device as described above.

BRIEF DESCRIPTION OF THE DRAWINGS

Some other features or aspects will be described using the followingnon-limiting embodiments of apparatuses and/or methods and/or computerprograms by way of example only, and with reference to the accompanyingfigures, in which

FIG. 1 shows a block diagram of an embodiment of a tire pressuremeasurement device;

FIG. 2 illustrates a block diagram of an implementation of an embodimentof a tire pressure measurement device;

FIG. 3 illustrates an implementation of an embodiment with an LF coil;

FIG. 4 depicts a block diagram of another embodiment; and

FIG. 5 shows a flow chart of an embodiment of a method for receivingdata at a tire pressure measurement device.

DETAILED DESCRIPTION

In the following some components will be shown in multiple figures,where consistent reference signs refer to functionally identical orsimilar components. Repetitive descriptions may be avoided forsimplicity purposes. Features or components depicted in dotted lines areoptional.

Accordingly, while example embodiments are capable of variousmodifications and alternative forms, embodiments thereof are shown byway of example in the figures and will herein be described in detail. Itshould be understood, however, that there is no intent to limit exampleembodiments to the particular forms disclosed, but on the contrary,example embodiments are to cover all modifications, equivalents, andalternatives falling within the scope of the invention. Like numbersrefer to like or similar elements throughout the description of thefigures.

As used herein, the term, “or” refers to a non-exclusive or, unlessotherwise indicated (e.g., “or else” or “or in the alternative”).Furthermore, as used herein, words used to describe a relationshipbetween elements should be broadly construed to include a directrelationship or the presence of intervening elements unless otherwiseindicated. For example, when an element is referred to as being“connected” or “coupled” to another element, the element may be directlyconnected or coupled to the other element or intervening elements may bepresent. In contrast, when an element is referred to as being “directlyconnected” or “directly coupled” to another element, there are nointervening elements present. Similarly, words such as “between”,“adjacent”, and the like should be interpreted in a like fashion.

The terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting of exampleembodiments. As used herein, the singular forms “a,” “an” and “the” areintended to include the plural forms as well, unless the context clearlyindicates otherwise. It will be further understood that the terms“comprises,” “comprising,” “includes” or “including,” when used herein,specify the presence of stated features, integers, steps, operations,elements or components, but do not preclude the presence or addition ofone or more other features, integers, steps, operations, elements,components or groups thereof.

Unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as commonly understood by oneof ordinary skill in the art to which example embodiments belong. Itwill be further understood that terms, e.g., those defined in commonlyused dictionaries, should be interpreted as having a meaning that isconsistent with their meaning in the context of the relevant art andwill not be interpreted in an idealized or overly formal sense unlessexpressly so defined herein.

FIG. 1 shows an embodiment of a tire pressure measurement device 10 of atire for a vehicle to receive data. In the following a vehicle maycomprise one or more tires or wheels, and a vehicle can be any vehicleusing tires, as, for example, a car, a van, a truck, a bus, a plane, abike, a motorbike, etc. Although, some embodiments may be exemplifiedusing a car, any other vehicles can be utilized in embodiments. As shownin FIG. 1 the tire pressure measurement device comprises a firstreceiver 12 to receive a low frequency signal using a first lowfrequency input of the first receiver.

Here and in the following an input may be a contact or an interface toconduct a signal or information to the respective component. Suchinformation or signal may be digital or analog. Hence an input may beimplemented using one or more wires, circuit paths, conductors, etc. Ifmultiple signal or information components are to be input, such inputmay be carried in a serial or in a parallel manner.

The first receiver 12, may be implemented as any means for receiving, ortransceiving, i.e., receiving or transmitting or both, one or morereceiver, transmitter or transceiver units, one or more receiver,transmitter or transceiver devices and it may comprise typical receiver,transmitter and/or transceiver components, such as one or more elementsof the group of one or more Low-Noise Amplifiers (LNAs), one or morePower Amplifiers (PAs), one or more filters or filter circuitry, one ormore diplexers, one or more duplexers, one or more Analog-to-Digitalconverters (A/D), one or more Digital-to-Analog converters (D/A), one ormore modulators or demodulators, one or more mixers, one or moreantennas, one or more coils, etc. LF may represent radio frequencies inthe range of 30 kHz-300 kHz, with wavelength ranges from one to tenkilometers. As will be detailed subsequently, in some embodiments, thefrequency may correspond to 125 kHz. As further shown in FIG. 1 the tirepressure measurement device 10 further comprises a second input for areceive signal of a second receiver 16 being different from the firstreceiver 12. The second receiver 16 may be internal or external to thetire pressure measurement device 10, internal or external to a substratethe tire pressure measurement device 10 is implemented on, respectively,as will be detailed in the embodiments described in the sequel. In theembodiment depicted in FIG. 1 the second receiver 16 is shown in brokenlines to indicate it is optional in this embodiment.

The second receiver 16 may be implemented using similar components asdescribed above for the first receiver 12, however, there are also otherembodiments which use different communication media for the secondreceiver 16. In the following embodiments will be detailed, which use anRF-receiver 16 a as an implementation for the second receiver 16. Otherembodiments described in the sequel use an electromechanic transducer 16b as second receiver 16. The tire pressure measurement device 10 furthercomprises a controller 14 to control the input of the first receiver 12and to couple the second input for the receive signal to the first lowfrequency input of the first receiver 12. As shown in the drawing, thecontroller 14 is coupled to the first receiver 12 via the first input.In embodiments, the controller 14 may be implemented using electroniccomponents, such a non-linear components, analog and/or digitalcomponents, one or more processing units, one or more processingdevices, any means for processing, such as a processor, a computer or aprogrammable hardware component being operable with accordingly adaptedsoftware. In other words, the described functions of the controller 14may as well be implemented in software, which is then executed on one ormore programmable hardware components. Such hardware components maycomprise a general purpose processor, a Digital Signal Processor (DSP),a micro-controller, a Field Programmable Gate Array (FPGA), aProgrammable Logic Device, a Programmable Array Logic (PAL) etc. Inembodiments, the controller 14 may also be implemented using one or moreApplication Specific Integrated Circuits (ASIC). As indicated by thebroken line, in embodiments the controller 14 may have further inputsand/or outputs.

In the following further embodiments will be described, which can, forexample, make use of an on-chip LFRX 12 interface (first input) but mayenhance a wheel module (tire pressure measurement device 10) so that itcan receive data instead by means of the second receiver 16. Inembodiments the LFRX may be used, for example, as wake-up source, toreceive commands, for end-of-line test purposes, as boot-loader, forprogramming or re-programming, etc.

In another embodiment as shown in FIG. 1 the second input is configuredto receive the receive signal using a frequency band outside a lowfrequency band used by the first receiver 12. FIG. 2 illustrates a blockdiagram of an implementation of an embodiment of a tire pressuremeasurement device 10. The tire pressure measurement device 10 comprisesmultiple sensors: a voltage sensor 21 a, a temperature sensor 21 b, anacceleration sensor 21 c, and a pressure sensor 21 d. A battery 22powers the device 10 through power supply management 23. The tirepressure measurement device 10 further comprises anAnalog/Digital-Converter 24 and a flash sensor calibration, data andapplication firmware 25, respectively. A microcontroller 26 is arrangedin the center, which may comprise the controller 14, the controller 14may as well be implemented as a separate block as shown in FIG. 2. Thetire pressure measurement device 10 further comprises a Read Only Memory(ROM) firmware library 27 and an RF transmitter which in the presentembodiment also comprises the second receiver 16, implemented as an RFreceiver 16 a. The RF transmitter may, for example, be configured totransmit tire pressure information and/or tire tread depth informationto a receiver of the vehicle (e.g. as part of an Electronic Control Unit(ECU)).

The tire pressure measurement device 10 also comprises the LF receiver12, which is configured to receive data using an LF signal at 125 kHzand which is coupled to the controller 14.

In the embodiment shown in FIG. 2 the second input of the controller 14is configured to receive a radio frequency receive signal from thesecond receiver 16 a. The controller 14 is configured to convert theradio frequency receive signal into the low frequency receive signal,which is then coupled to the first low frequency input of the firstreceiver 12. The conversion of the RF-signal allows re-using RFcommunication to receive data. Moreover, in a further embodiment thecontroller 14 comprises a demodulator configured to demodulate the radiofrequency receive signal into the low frequency receive signal. Such animplementation may be very efficient, as a large LF receiver coil may bereplaced by a rather small diode. The overall weight, size and price ofthe tire pressure measurement device 10 may be reduced. Thus, in someembodiments instead of receiving electromagnetic radiation at 125 kHz,RF antenna circuitry may be used and a demodulator. The demodulator maycomprise at least one non-linear electronic component, for example, theat least one non-linear electronic component comprises at least onediode. The demodulator may be then be further configured to demodulatean Amplitude Modulated (AM), or an Amplitude-Shift-Keying (ASK)modulated radio frequency receive signal into the LF receive signal. Asshown in FIG. 2 the tire pressure measurement device 10 in thisembodiment comprises the second receiver 16 a, a matching network forthe second receiver 16 a and a radio frequency antenna 28. Generally inembodiments the tire pressure measurement device 10 may comprise one ormore of these components. Hence, embodiments may receive AM or ASK datacoming in at ISM frequency.

FIG. 3 illustrates another implementation of an embodiment of a tirepressure measurement device 10. FIG. 3 shows a Printed Circuit Board 30on which the components of the tire pressure measurement device 10 aremounted. Among these components there is an LF coil 29, which may stillbe implemented in some embodiments to allow for flexible communicationusing LF or RF. The embodiment of FIG. 3 further shows a battery 22 topower the tire pressure measurement device 10. FIG. 3 illustrates an RFantenna 28, which is implemented as wire placed on the PCB 30.

In yet another embodiment second input is configured to receive thereceive signal being based on an acoustic receive signal. Such a signalmay have, for example, a frequency or a bandwidth in the range ofinfrasound, audible sound up to ultrasound. While microphones andloudspeakers are known to be able to conduct such signal conversions,certain materials, for example, piezoelectric devices or crystals, mayalso be used as transducer 16 b implementing the second receiver 16 toreceive the acoustical receive signal. Ultrasonic, sonar, or magneticsensors may be used to form a transducer 16 b, e.g. a sound receiver,transmitter or transceiver (a combined receiver and transmitter). Forexample the transducer 16 b may be configured to convert sound appliedto the tire into an electrical signal as receive signal. The controller14 is then configured to couple the electrical signal to the input ofthe first receiver 12. Still the converted signal is an electricalsignal in the LF range, but received as an acoustical signal in thisembodiment. More specifically, in an embodiment using soundcommunication, the received data may come in as sound at 125 kHz that ispicked up by the electromechanic transducer 16 b.

The transducer 16 b may be configured to receive and/or generateacoustical signals, which may be an acoustical pulse, a waveform, asequence of pulses or waveform, a chirp, a burst, an AM or ASK signaletc. The transducer 16 b may comprise separate acoustical transmitter(to transmit an acoustical signal, for example, for measurementpurposes) and receiver (to receive acoustical signals). So both optionsare conceivable for the transducer 16 b in general: separate modules foracoustical transmission and reception or a single module (e.g. a singlemembrane, or crystal or piezoelectric device).

Embodiments may allow to get rid of the LF coil when an ISM band datatransmitter is used or when a 125 kHz ultrasound data transmitter isused instead of a 125 kHz electromagnetic data transmitter. Embodimentsmay still provide the possibility to use an LF coil for applicationswhere neither an ISM data transmitter nor a 125 kHz ultrasound datatransmitter is available. Hence, embodiments may enable more universalor flexible communication means for a tire pressure measurement device10, for example, being capable of receiving data via RF, LF and/or soundcommunication.

In embodiments the transducer 16 b may be further configured to convertmechanical energy from tire deformation into electrical energy forpowering the tire pressure measurement device 10. In some embodimentsthe transducer 16 b from an energy harvester may be re-used. Thetransducer 16 b may be further used for other purposes. For example, thetransducer 16 b may additionally or alternatively be configured to carryout sound measurements, such as tread depth measurements, water contactdetection, etc.

In yet another embodiment the controller 14 is configured to couple andto decouple the second input with the first low frequency input. Hence,depending on a current purpose of the second receiver 16 (signaltransmission or reception, measurements, energy harvesting, etc.), thecontroller 14 may switch or couple the inputs differently. For example,the controller 14 may be configured to switch the second input betweenthe first input of the first receiver 12 and at least one other signal.

FIG. 4 illustrates another embodiment, which has more universal orflexible communication properties. The embodiment depicted in FIG. 4comprises multiple components, some of which are comprised in the sameintegrated circuit or chip (shown on the left hand side of FIG. 4) andsome of which are implemented on the PCB. FIG. 4 shows an RFtransmitter/receiver (Tx/Rx) 16 a at the top left, which is coupled toan RF-antenna 28 through matching network 40. In this embodiment RFtransmitter and receiver are implemented together in one block 16 a. Inother embodiments they may be implemented as separate blocks. The tirepressure measurement device 10 comprises the LF receiver 12 according tothe above description. The controller 14 comprises a demodulator 41,which is coupled to the RF Tx/Rx 16 a. For example the output of the RFmatching network 40 may be looped through the RF-Tx/Rx 16 a to the inputof the controller 14 and transmitter components may be switched offduring reception. The controller 14 further comprises a switch 43 a tocouple and to decouple the output from the RF Tx/Rx 16 a with the firstinput of the LF receiver 12 via the demodulator 41. In anotherembodiment the controller 14 may be coupled with the output of thematching network 40. The second receiver 16 may then correspond to saidcoupling, said coupling and matching network 40 and/or RF antenna 28,respectively. The second receiver 16 may optionally comprise furthercomponents, such as filter circuitry, LNA, etc.

The input of the LF-receiver 12 may also be coupled to an LF coil 29 viaanother matching network 42, to still provide the option ofcommunicating using LF electromagnetic signals. The embodiment of FIG. 4further shows an electromechanical transducer 16 b, which is coupled tothe controller 14 and an energy harvesting circuit 44 as well as a soundmeasurement circuit 46 on the chip. The controller 14 further comprisesa switch 43 b to control the coupling of an output of the transducer 16b with the LF-receiver 12 according to the above. In some embodiments,the tire pressure measurement device 10 further comprises a lowfrequency coil 29, and the controller 14 may then be configured tocouple the low frequency coil 29 to the first input of the firstreceiver 12. That is to say, in further embodiments the controller 14may comprise a third switch to control the coupling of the LF-coil 29, aselector switch to switch the first input to the different circuits orcomponents, respectively. As can be seen from FIG. 4, in this embodimentthe controller 14 has multiple inputs, one for an RF signal from the RFTx/Rx 16 a, one from the electromechanical transducer 16 b, and one fromthe matching network 42 of the LF-coil 29.

In more detail, an embodiment may pick up an electromagnetic signalusing the RF antenna 28. The signal is impedance-matched andfrequency-filtered by a matching network 40, so frequency componentsaround the RF transmit frequency arrive at the demodulator 41 of thecontroller 14. The demodulator 41 can be placed on the integratedcircuit or it can be placed on the PCB. The demodulator 41 can beimplemented in a very simple way: A nonlinear device like a diode biasedwith a small DC (Direct Current) current, e.g. 100 nA, directly convertsthe AM or ASK content of the RF signal into baseband. This signal iscoupled into the LF Receiver 12 and further processed there. Optionally,the demodulator 41 can be deactivated or disconnected from the RFTransmitter 16 a when not needed or during an RF transmission.

The electromechanical transducer 16 b converts sound applied to the tireinto an electrical signal. This signal is coupled into the LF receiver12 and further processed there. The signal can be fed into a dedicatedinput of the LFRX 12 or into an input otherwise used for connecting tothe LF-Coil 29. The controller 14 may comprise a switch or coupler,which can be placed on the integrated circuit or it can be placed on thePCB. Optionally, the controller 14 may disconnect the LF receiver 12from the electromechanical transducer 16 b when/if not needed or duringenergy harvesting or when/if sound/acoustic measurements like treaddepth measurements are performed. Embodiments may enable data receptionin a configurable manner, e.g. via any physical data carrier likeelectromagnetic via LF or via RF, and/or via sound. Signal processingand data decoding may then be done via an on-chip LF receiver 12.

Embodiments may enable additional features for a tire pressuremeasurement device 10, that may provide added value for an end-user,like tire identification, mileage counter, tread depth measurement,water detection etc. Embodiments may be surface-mounted on a PCBassembled in wheel-unit or in-tire unit application housing. The tirepressure measurement device 10 may be supplied by a small battery 22,additionally or alternatively using an energy harvester (possible usingthe same transducer 16 b).

Another embodiment is an integrated circuit comprising the tire pressuremeasurement device 10 according to the above description. Anotherembodiment is a printed circuit board comprising an embodiment of theintegrated circuit.

FIG. 5 shows a flow chart of an embodiment of a method for receivingdata at a tire pressure measurement device 10 for a vehicle. The methodcomprises controlling 52 an input of a first receiver 12 for a lowfrequency signal. The method further comprises providing 54 a receivesignal from a second receiver, which is different from the firstreceiver. The method further comprises coupling 56 the receive signal tothe input of the first receiver.

Another embodiment is a computer program product comprising a computerreadable medium having computer readable program code embodied therein,the computer readable program code being configured to implement one ormore of the above described methods, when/if being loaded on a computer,a processor, or a programmable hardware component. Another embodiment isa computer program having a program code on a non-transitory media forperforming, when/if the computer program is executed on a computer or ona processor, one of the above methods. A further embodiment is acomputer readable storage medium storing instructions which, when/ifexecuted by a computer, cause the computer to implement one of themethods described herein.

A person of skill in the art would readily recognize that steps ofvarious above-described methods may be performed by programmedcomputers. Herein, some embodiments are also intended to cover programstorage devices, e.g., digital data storage media, which are machine orcomputer readable and encode machine-executable or computer-executableprograms of instructions, wherein said instructions perform some or allof the steps of said above-described methods. The program storagedevices may be, e.g., digital memories, magnetic storage media such asmagnetic disks and magnetic tapes, hard drives, or optically readabledigital data storage media. The embodiments are also intended to covercomputers programmed to perform said steps of the above-describedmethods or (field) programmable logic arrays ((F)PLAs) or (field)programmable gate arrays ((F)PGAs), programmed to perform said steps ofthe above-described methods.

The description and drawings merely illustrate the principles of theinvention. It will thus be appreciated that those skilled in the artwill be able to devise various arrangements that, although notexplicitly described or shown herein, embody the principles of theinvention and are included within its spirit and scope. Furthermore, allexamples recited herein are principally intended expressly to be onlyfor pedagogical purposes to aid the reader in understanding theprinciples of the invention and the concepts contributed by theinventors to furthering the art, and are to be construed as beingwithout limitation to such specifically recited examples and conditions.Moreover, all statements herein reciting principles, aspects, andembodiments of the invention, as well as specific examples thereof, areintended to encompass equivalents thereof.

The functions of the various elements shown in the Figures, includingany functional blocks labeled as “means”, may be provided through theuse of dedicated hardware, such as “a processor”, “a sensor”, “acontroller”, “a transmitter”, “a receiver” etc. as well as hardwarecapable of executing software in association with appropriate software.When provided by a processor, the functions may be provided by a singlededicated processor, by a single shared processor, or by a plurality ofindividual processors, some of which may be shared. Moreover, explicituse of the term “processor” or “controller” should not be construed torefer exclusively to hardware capable of executing software, and mayimplicitly include, without limitation, digital signal processor (DSP)hardware, network processor, application specific integrated circuit(ASIC), field programmable gate array (FPGA), read only memory (ROM) forstoring software, random access memory (RAM), and non-volatile storage.Other hardware, conventional and/or custom, may also be included.Similarly, any switches shown in the Figures are conceptual only. Theirfunction may be carried out through the operation of program logic,through dedicated logic, through the interaction of program control anddedicated logic, or even manually, the particular technique beingselectable by the implementer as more specifically understood from thecontext.

It should be appreciated by those skilled in the art that any blockdiagrams herein represent conceptual views of illustrative circuitryembodying the principles of the invention. Similarly, it will beappreciated that any flow charts, flow diagrams, state transitiondiagrams, pseudo code, and the like represent various processes whichmay be substantially represented in computer readable medium and soexecuted by a computer or processor, whether or not such computer orprocessor is explicitly shown.

Furthermore, the following claims are hereby incorporated into theDetailed Description, where each claim may stand on its own as aseparate embodiment. While each claim may stand on its own as a separateembodiment, it is to be noted that—although a dependent claim may referin the claims to a specific combination with one or more otherclaims—other embodiments may also include a combination of the dependentclaim with the subject matter of each other dependent claim. Suchcombinations are proposed herein unless it is stated that a specificcombination is not intended. Furthermore, it is intended to include alsofeatures of a claim to any other independent claim even if this claim isnot directly made dependent to the independent claim.

It is further to be noted that methods disclosed in the specification orin the claims may be implemented by a device having means for performingeach of the respective steps of these methods.

Further, it is to be understood that the disclosure of multiple steps orfunctions disclosed in the specification or claims may not be construedas to be within the specific order. Therefore, the disclosure ofmultiple steps or functions will not limit these to a particular orderunless such steps or functions are not interchangeable for technicalreasons.

Furthermore, in some embodiments a single step may include or may bebroken into multiple substeps. Such substeps may be included and part ofthe disclosure of this single step unless explicitly excluded.

What is claimed is:
 1. A tire pressure measurement device for receivingdata, comprising: a first receiver configured to receive a low frequencysignal at a first low frequency input of the first receiver; and asecond input configured to receive a receive signal associated with asecond receiver that is different from the first receiver; and acontroller configured to control the low frequency input of the firstreceiver and to couple the second input to the first low frequency inputof the first receiver in order for the first receiver to receive thereceive signal at the first low frequency input.
 2. The tire pressuremeasurement device of claim 1, wherein the second input is configured toreceive the receive signal in a frequency band outside a low frequencyband used by the first receiver.
 3. The tire pressure measurement deviceof claim 2, wherein: the second input is configured to receive a radiofrequency receive signal, and the controller is configured to convertthe radio frequency receive signal into a low frequency receive signal,and output the low frequency receive signal to the first low frequencyinput of the first receiver.
 4. The tire pressure measurement device ofclaim 3, wherein the controller comprises a demodulator configured todemodulate the radio frequency receive signal into the low frequencyreceive signal.
 5. The tire pressure measurement device of claim 4,wherein the demodulator comprises at least one non-linear electroniccomponent.
 6. The tire pressure measurement device of claim 5, whereinthe at least one non-linear electronic component comprises at least onediode.
 7. The tire pressure measurement device of claim 4, wherein thedemodulator is configured to demodulate an Amplitude Modulated (AM) oran Amplitude-Shift-Keying (ASK)-modulated radio frequency receive signalinto the low frequency receive signal.
 8. The tire pressure measurementdevice of claim 1, further comprising: at least one of the secondreceiver, a matching network for the second receiver, and a radiofrequency antenna.
 9. The tire pressure measurement device of claim 1,wherein the second input is configured to receive the receive signalthat is based on an acoustical receive signal.
 10. The tire pressuremeasurement device of claim 9, further comprising: an acousticaltransducer configured to receive the acoustical receive signal.
 11. Thetire pressure measurement device of claim 10, wherein the acousticaltransducer is configured to convert sound applied to a tire into anelectrical signal as the receive signal.
 12. The tire pressuremeasurement device of claim 11, wherein the controller is configured tocouple the electrical signal to the first low frequency input of thefirst receiver.
 13. The tire pressure measurement device of claim 12,wherein the acoustical transducer is configured to convert mechanicalenergy from tire deformation into electrical energy for powering thetire pressure measurement device.
 14. The tire pressure measurementdevice of claim 13, wherein the acoustical transducer is furtherconfigured to carry out sound measurements.
 15. The tire pressuremeasurement device of claim 1, wherein the controller is configured tocouple and to decouple the second input with the first low frequencyinput.
 16. The tire pressure measurement device of claim 1, wherein thecontroller is configured to switch the second input between the firstlow frequency input of the first receiver and at least one other signal.17. The tire pressure measurement device of claim 1, further comprising:a low frequency coil, wherein the controller is configured to couple thelow frequency coil to the first low frequency input of the firstreceiver.
 18. A method for receiving data at a tire pressure measurementdevice, comprising: controlling an input of a first receiver forreceiving a low frequency signal; providing a receive signal from asecond receiver, which is different from the first receiver; andcoupling the receive signal to the input of the first receiver.
 19. Acomputer program product comprising a computer readable medium havingcomputer readable program code embodied therein, the computer readableprogram code being configured to implement a method for receiving dataat a tire pressure measurement device, the method comprising:controlling an input of a first receiver for receiving a low frequencysignal; providing a receive signal from a second receiver that isdifferent from the first receiver; and coupling the receive signal tothe input of the first receiver.